I renamed the computer that runs SQL Server. When I restarted SQL Server, I received an error message warning that my installation was corrupted or had been tampered with. What should I do?
If you change the computer name of the server, you will not be able to start SQL Server until you rerun SQL Server Setup. You will be prompted to upgrade, and the necessary SQL Server options will be reset with the new computer name. After you have upgraded, exit the Setup program. Your databases will not be affected by this procedure.